Blow-off for boilers



Nov. 17, 1925 of 5.9 5 -1 v 4 `Z ii O A Z5 Z4 wiz@ ZZ Z6 1,562,336Y H.M. KAUL l BLowoFF'- FORl BoILERs Filed April 26. 1922 7%, a.. pffw@lPatented Nov. 17, 1925.

HERMAN M. KAUL, or GEDARBURG., WISCONSIN.

4BLOW-ori? non Boriiiins.

Application fnediiprii 26, i922.v semi ivo. 556,589.

To all whom t may concern.'

Be it known that'I, HERMAN Kiiumal vcitizen of the United States, andresident of Cedarburg, in the county .of Ozaukeeand State of Wisconsin,have invented new and useful Improvements in Blow-,OHS for Boilers,'ofwhich the following is-adescription', reference being had to theaccompanying drawings, which are a part ofthis specification. f i

The invention relates to 'boilers and more particularly to Vthe blow-olfapparatus thereof. f

As usually made, the-blow-oii apparatus blow-off valve is under thecontrol of anattendant whois supposed to open this valve atpredetermined periods to blow off the sediment in the settling tanlro'fthe blow-off system for the boiler. With sucli av system of manualcontrol .there is an ever present dangerof they attendant lforgetting toopen theblow-off Yvalve when he should, and to fdo away' with the humanfactorv and reduce to acertainty the operation ofthe blow-olf valve atthe periods, desired, IhaveV providedl mechanism for automaticallyoperating the blow-oill valve at predetermined periods of time, and moreparticularly have provided a lfloat-operated mechanism for.

actuating the blow-off valve.

With the above and other objects in view,

the invention consists in the construction and the several features ofconstruction hereinafter described and all equivalents.

. In the drawings: Fig. 1 is a vertical sectional view through a deviceembodying the invention; Fig. 2 is a detail view of the timing valve. 4

In thedrawings the numeral 3 designates the usual settling tankconnected by a pipe 4 with the boiler andhaving an outlet or blow-pipe 5connected with a valve casing 6.

A blow-olf valve 7 controls the flow from the pipe tlirough the casing 6Vto a pipe 8 which communicates with a drain pipe 9L The valve 7 isvpreferably of the conical type or needle valve and isnormally .held`against a seat 10vv by a spring llsurroundi'ng the stem which projectsinto a chamber in a` casing 13.

.Within 14, and a float A15 carried-hva lever ,'16 is adapted to beraised by liquid introduced into said chamber 14. The lever lop'erthecasing 13 visla iioat chamber' ates in the vfloat chamber 14 anditspivots 17 project into the chamber* 12. -OneV ofV these-pivotsy 17has-an arm v18 mounted thereon and-"this arm carries a lroller 19 soLadaptedto engage with j a member 2() secured tothe'stem of the valve 7,it being vkunderstood that the arm 18 is disposed infront .of `r themember 20. l,VVi'tli the construction thus l far describeditfwillbenoted that'raising of the float will swingthearin 18- forwardly andwhen the roller 19 strikes the member 2O it will acttoopen the valve 7In order to kproduce a.'delayedclosingffof;

ythe valve, If providean roilv dash-pot mechis constructed so that amanually'V operated anism associated therewith whichmay beof kanysuitable construction. For'the purpose of illustrating one form ofsuchmechanism, i i

I' show an oil" cylinder 21, a piston 22work ing in the boreofsaidcylinder and having its piston rod 23 prOjQCtIig-into the cham-`ber 12 and connected to the member L 20, a

by-pass I24 formed in the cylinder communi-" i I i eating with oppositeendsy of' thebore, and a needlevalve regulatingthefflow of 'oil throughsaid by-pass. 1 A spring26acts toA move the 'piston 22`towardV thecasing 13,. As the piston rod 23 and the valve 7 are both-connected tothe member 20,; the movement of the valve 7 to a closingfpositionunderthe influence ofthe springs 11 and 2,3 will be delayed or 'retardedbythe slow flow of oil fromthe rear of the piston tol the i I frontthereof through the restrictedV by-pass 24 and theV extent of thisretardation Lmay be regulated by the adjustment yof the valve 25;

In order to'` have the float;operatek on thek valve 7 `only 'atl thetimeiapredetermined .i l amount of the liquid has been introduced in thechamber yso as to'exert a certain predetermined buoyant force onsaidfloat, I. interpose 4a counteracting force resisting' the mo-ve- Ymen-t of' the fipa until suoli Condition has;

vbeen reachedand for this purpose' a lever is pivotally mounted at oneend on the arm 18 ico and its free end engages va stop 28r an'dfsaidfree-end is alsoconnected to tlievarmfby i i i Vmeans of ajro'd 29 and'aI spring 30. The rod 5 29 is secured tothe lever 27 -and thel springv j.p .105

isV interposednbetvveen the' head -endl vrofV said `f rodland thearm18', Wherebyrela'tiveswingiio 27 against relative movement, and as thelever27 is heldagai'nst movement by" the" stop 28 the arm will not bemoved to operate the valve 7; Vhen, however, this force is4 exceeded,the spring y Wi-llbe compressed Vand the arm 18 ivill start toV moveVforwardly, and because orp this relative movement ofthe kparts theupper Yfree end of the leverr 27 f snaps lij'ree of the stop 28 and thenthe full buoyant force acting'on.;Y the float is ,trainsmitted by thearm against' the 'member 20,

' thereby quickly opening the valve 7 to its full extent.Y In orderthat" the ypartsmay beautomatically vreset on the return ofthe.

arm 18, the, stop 28 is made in the form ot' Va pivoted 'finger having abevelled edge V81' adapted vto cooperateivith the bevel'led edge 32 ofAthe, lever :27, a sprinig kpermitting thel lever 27 tojraise the stop28 on its return movement and -iiormally holding "said stop inoperativeposition against iiXed stop- In order that theoperation of the iioatupon the valve may be made tooccur at, if predetermined intervalsottime, I provide means Vfor regulating .the flow 'of iiuid to the floattank,Wh-ich mea-ns 'may bef'ad-justed Y for .different time intervals.VFor this pui-' pose,iin a'supply pipe 35 leadinginto the float chamber14 Ifprovidea va-lveeasing y With a needle valve 37 controlling thepassage of liquid therethrough. ThisV needle valve has its stem threadedso that it may be-advanced or Vretracted from its seat 38 e and carriesa pointer 39jon its-exposed end AWhich cooperates' with, an index- .dial40.

.TheV indices of this Vdial 40 represent 'the time lit takes, for anygiven setting of theH valve 37, for enough liquid `to flow intothechamber 14 to operate the oat, fsu/ch as for instance, periodsfromyle'ss than an hour-to more thainivehours. As soon astheffloatoperatesthe valve 7',- the liquid, or,Y

Y sov much thereof as is necessary for the operation .o-f the float inthe ldesired time interval, isf-automatically drained out ofthe tankduring. the delayedreturno-the float I bythe opening,` of a drain valve'41 controllingv the'k flow-of liquidto the pipe` 9V.. n This drainvallve has its Ystem connected to a Viveigl'i'te'cl "lever 42pivotallymounted inter-V mediate its Vei'ids upon a .pi-n 43 onafbracket 44 inthe iioat chamber 14. The Weight 45V at theiupp'er end of jthemleverAWhile Y notches 46jvand 4'?V are provide-d in the lower. end-ofthelever. A pinf 48 on thelever 16,V

a lost motion connection with the lever 44 'byfreasonfof the notchf46butWhen -the,` Y )floatVv 1 is,V E compl,etilng, V its valve-openingmovement Athe 'pin 48 strikes the upperl side Y Yof thel notchg46 in thelever 44V and swings its Weighted end forwardly, Vas shoivniiriLchattedk .lines in'fFig. 1', and indoing'/ so the valve 41s opened todrainthe tank Y14. stop" 49 adjacent the notch 47-limits thesivingin'gmovement of the lever 42 vwhen the valve 41is openedi Onthereturnof thefloat to its inoperative position the pin 48 strikes the Vlower side kofthe notch 46 and throws the lever 42'v over tol its initialv position,

thereby closing the drain valve. To increase the vflovv of vliquidifromthe tank 14, I provide the end oi'l the pipe 9 with an ejector nozzle.50, and since the Water blown ofi through the pipe 8 is at relatively`high pressure, an ejector effect will be produced -inf the pipe 9 Whichwill have Va suction effect on the Water iin the tank 14;k Y

I desire it to be understood Vthat this'in-v Vvention islnot to belimited to any specific Y form or arrangement rof parts yexceptin so faras such limitations..are` specified. iin theL Claims- Y i@ What I claimas myinvention is: K 1. In a .boiler blow-oit system, the com# bination,with the blow-ofi valve, of a iioat Y tank, a float in saidv tank, meansfor controll-y lingthe flow of liquid to andfrom the tank to produceperiodic operation ofsaid float,

' and means moved by the float on its upward Ymovement foi-'effectingthe sudden opening A,

ol."Y said valve independent of fthe rate of A Y 'iioivf'of the liquidinto said tank# 2. In a boilerbloiv-oif system the combination, with theblow-off valve, of'a 'float tank, a float in said tank, means forcontrolling the flow of liquid to and lfromfsaid tank toproducerperiodicoperation of Ysaid float, means moved by ,theV fioat on'its iip- Wardfmov'ement lfor effecting the sudden opening` of said valveindependent of the rate of flow of the liquid into saidtank,

or liquid to and from the tank to producel periodic operation of saidfloat.

.p 4. In a boiler blow-off system, *the combination, ivith thebloWV-ofvalve, of aV idoatV tank, a float infsaid tanlgmeans movedby thelioat to operate saidY valve, an adjustable valve in the'liquidsupplyxto saidl tank, and

a valvecontrolling-the,flow lof liquid;A from iis izo

the taint, said last named valve `and said blow-oil valve 'beingautomatically {pe} f 5. a boiler blowbii system, the combi-q Y nation,lwith the blow-.ofi valve, of( a 'Heattank, a loatin'said tank, meansVmoved by the ioat to?openf'said'valVe, means vfor re- Vtardingftheclosing` movementofsaid (valve, .n means forV restraining Ythe action ofsaid Y'.1idically operatedY the yaction lof'said Y valve beyond thenormal rate of movement" Y 15 oat until a predetermined buoyant pressurethereon is reached, and means for controlling the flow of liquid to andfrom the tank to produce periodic operation of saidv float.

6. In a boiler blow-o system, the combination, With the bloW-oif valve,oi a iioat tank, a float in said tank, means controlling the supply ofliquid to said float tank, means moved by the float to periodicallyoperate said valve, a ioat-'operated drain valve controlling the iiow ofliquid from said tank, andm'eans for accelerating the opening andclosing movements of said of said fioat.

'l'. In a 'boiler blow-olf system, the combination with the blow-ovalve, of a float tank, a float in said tank, means moved by the floatto operate said valve, means controlling the supply of liquid to thefloatv tank, a drain valve controlling the flow of liquid from the tank,and a Weighted lever operatively connected to said drain valve, saidlever being engageable by the float and Vmoved thereby near the ends ofthe travel of said float to open andfclose said drain valve, and saiddrain valve and blow-off valve being periodicallyoperated by said float.y

8. In a boiler blow-oil' system, the combination with the blow-oil'valve, of a float Y i tank, a float in said tank, means .including anarm moved by said float to openl said 'i valve, a lever carried by saidarm, a spring resisting yrelative movement `between said arm and lever,a stop' engageable by said 9. In a boiler blow-off system, thecombinationv With the 'blow-off valve, of la float tank, a float in saidtank, means including an arm moved by said float to Vopen said valve, alever carried by" said arm, aspring resisting yrelative movement betweensaidy arm and lever, awpivoted sel`f-setting stop engageable byvsaidlevei for restraining the Vaction of said vfloat untilapre-determinedl lbuoyant .pressure on said' float is reached,

and means for `controlling the flow of liquid v'v' to and from thetankto produce periodicy operation of theiioat.

10. In a boilerbloW-off system, the combination with thelbloiv-offvalve, of a float i tank, a float in saidtank, means moved by the float`to operate said. valve, means :forl periodically.operating'said ioat,and means 60 for `facilitating the periodicdrainingV of said tankincluding an ejector connectedH with said blow-off` valve. 1

In testimony whereof, I afiix my signature. i V

4o to produce periodic operation of the float. y

